EP1040822A1 - Extensible Mask with an adhesive matrix which is at least stretchable when wetted - Google Patents

Abstract

In a mask for the face or body, comprising a carrier sheet (CS) coated on one face with a permanent adhesive matrix (AM) (wh adheres to both dry and wet skin) and skin treatment active agent(s) (AA) contained in CS and/or AM, AM is stretchable (at least wet form) such that the mask can be adapted to the shape of the region to be treated. CS is also stretchable (at least in wet form) to correspond with the deformation of AM.

Description

The present invention relates to a mask for the face or the body.

There is a need to have a mask which can easily adapt to the morphology of the user in order to obtain in particular a more effective treatment.

The invention thus aims to propose a new mask capable of adapting easily to the different contours and reliefs of the face or the part of the body on which it is applied.

The mask according to the invention comprises a support sheet coated on one side an adhesive matrix comprising a permanent adhesive adhering to dry skin and wet, at least one of the backing sheet and the adhesive matrix comprising at least less an active ingredient intended to exert a specific action on the skin, and is characterized by makes the adhesive matrix stretchable at least in the wet state to allow a adaptation of the mask to the shape of the face or the part of the body to be treated, the sheet of support being chosen to be able, at least in the wet state, to stretch in order to accompany the deformations of the matrix.

Thanks to the invention, there is a mask which allows a more effective than certain known masks which are not stretchable and which only adhere too weakly skin to allow proper positioning during installation.

In a particular embodiment, the mask present at the time of use, in at least one direction, an elongation factor between 5 and 30%, preferably between 10 and 30% and more preferably between 15 and 30%.

Preferably, the adhesive is hydrophobic.

More preferably, the adhesive matrix forms an occlusive layer.

The backing sheet may have perforations and / or cutouts intended to make it stretchy or to increase its elongation factor.

These perforations can be diamond-shaped, for example.

The cuts can be in the form of slots arranged in staggered, for example.

Still in a particular embodiment, the adhesive matrix includes one or more several water-absorbing substances, for example polyacrylates, particles or natural or synthetic water-absorbent fibers, alginates, corn derivatives or cellulose.

In a particular embodiment, the adhesive matrix comprises one or more water-soluble and / or liposoluble active ingredients.

The adhesive matrix may include collagen.

The adhesive matrix and / or the support sheet may include extracts dry of animal or vegetable origin and / or mineral substances.

Still in a particular embodiment, the support sheet is produced in a water-swellable material.

The support sheet can also be formed by an elastic woven.

As a variant, the support sheet may also consist of a nonwoven hydrophyle.

The carrier sheet may contain one or more substances or particles or water-absorbent fibers, for example polyacrylates and / or a proportion significant viscose or cotton, for example between 30 and 90% (by mass).

The backing sheet may include polypropylene or polyester, for example example between 5 and 95% (by mass).

In a particular embodiment, the mask includes active ingredients chosen for exercise an action chosen from the following non-exhaustive list: hydrate, level, brighten, tone, thin, heal, numb.

In a particular embodiment, the adhesive and the support sheet are chosen from so that when wet, the mask has a surface in the stretched state greater than 5 at 70% at the surface of the mask in the dry state, and preferably greater by 10 to 70% and preferably still from 20 to 70%.

The adhesive can be chosen from the following list: acrylic-based adhesives, vinyl, polyurethane, silicone or elastomer (butyl or latex for example) or copolymers and / or mixtures thereof.

Advantageously, the adhesive is chosen so as to present, when it is applied in the fluid state to the support sheet during the manufacture of the mask, a viscosity allowing it not to cross it.

The adhesive matrix may include plasticizers, oils or polyols (glycerin for example) to make it sufficiently stretchable.

The backing sheet and / or the adhesive matrix can be colored.

In a particular embodiment, the support sheet is not stretchable as long that it is not impregnated with water and preferably it is not stretchable either when it is in contact with the matrix in the fluid state, in the solvent phase, during the manufacture of the mask.

Another subject of the invention is the use of a mask as defined above to treat the face, neck or thighs for example, the mask being soaked in water before application, then applied to the skin, preferably wet beforehand being stretched so as to adapt to the morphology of the user, or alternatively applied in the dry state on wet skin, the support sheet then being sprayed with water.

• la figure 1 est une vue en coupe, très schématique, illustrant la structure d'un masque conforme à un exemple de réalisation de l'invention,
• les figures 2 à 5 représentent différentes variantes de perforations ou de découpes de la feuille de support, destinées à favoriser sa déformation, et
• les figures 6 et 7 représentent respectivement le masque à l'état initial et à l'état étiré.

The invention will be better understood on reading the detailed description which follows, of nonlimiting exemplary embodiments of the invention, and on examining the appended drawing in which:

• FIG. 1 is a very schematic sectional view illustrating the structure of a mask according to an exemplary embodiment of the invention,
• FIGS. 2 to 5 represent different variants of perforations or cutouts of the support sheet, intended to promote its deformation, and
• Figures 6 and 7 respectively represent the mask in the initial state and in the stretched state.

In the embodiment shown in Figure 1, the mask has a carrier sheet 2 coated on one side with an adhesive matrix 3 containing an adhesive and active ingredients 4 embedded in the adhesive.

A removable protective film 9 protects the adhesive matrix 3 before use.

The support sheet 2 has perforations 5 having a shape substantially rectangular when viewed from above, as can be seen on the figure 2.

The support sheet 2 is constituted in the example described by a water-swellable nonwoven of density between 20 and 100 g / m ² , for example 50 g / m ² , comprising 30% of polyester fibers and 70% of polyester fibers. viscose.

The adhesive here is a permanent acrylic-based adhesive.

Among the other adhesives which can be used, mention may in particular be made of adhesives based on vinyl (for example vinyl acetate), polyurethane, silicone or elastomer (butyl or latex for example), the adhesives used can be partially crosslinked.

During the manufacture of the mask, the adhesive matrix 3 is coated in the fluid state in the solvent phase on the support sheet, its viscosity being high enough to prevent it from crossing the backing sheet.

In general, the adhesive matrix 3 is deposited in an amount preferably between 15 and 70 g / m ² , and preferably has an adhesive power (Tackiness Adhesive Coefficient) between 200 and 600 g / cm ² on the skin dry and between 20 and 150 g / cm ² on wet skin.

In the example described, the adhesive matrix is deposited with an amount of 40 g / m ² and constitutes an occlusive layer.

The mask which has just been described is not stretchable in the dry state, because the sheet of support 2 is not stretchable in the dry state.

The mask is cut to the shape of the part of the body to be treated and includes the if necessary, cutouts for the eyes, nose and mouth. Possibly, the mask is in two parts, the border being materialized by a broken line in Figure 6.

To use the mask, the user soaks it in water and then applies it to the skin, after having wet it beforehand. Alternatively, the mask can be applied in the dry state on the wet skin, then the support sheet is sprayed with water.

The support sheet 2 loaded with water swells and expands, which allows the adhesive matrix 3 to be stretched by the user. In the example described, the elongation factor of a rectangle of a few cm ² cut from the mask is approximately 15% in the longitudinal direction.

The user begins by positioning an edge of the mask on the skin and then step by step, adjusts it over the entire surface to be treated.

The properties of the adhesive matrix allow the mask to be repositioned.

Thanks to the stretchability of the support sheet and the adhesive matrix, the mask is best suited to the user's morphology.

The entire surface of the adhesive matrix 3 can thus come into contact with the whole face or part of the body to be treated.

FIG. 7 shows, by way of example, the shape of the mask 1 once stretched to conform to the contours and contour of the user's face.

As an indication, in the example described, the initial width of the mask is l _i = 15 cm approximately in the dry state and changes to l _f = 18 cm in the wet and stretched state.

The support sheet 2 can be produced in various ways without leaving the part of the present invention.

It may not include any perforation, cell or cutout but be simply made of a water-swellable material capable of accompanying once impregnated with water the deformations of the adhesive matrix when the mask is applied on the face.

The support sheet can also include all types of perforations or cells for increasing its extensibility, for example perforations 6 in diamond shape as shown in Figure 3.

The support sheet 2 may also have slots staggered, allowing the mask to stretch in a direction perpendicular to the slits, by spacing of the edges of the slots, in the manner of an expanded metal.

The support sheet 2 can also include cutouts 8 in the form of a Z, staggered, as shown in Figure 5. The edges of these cutouts may spread when the mask is stretched.

All types of active ingredients 4 can be incorporated into the adhesive matrix 3 and / or into the support sheet 2, depending on the treatment to be carried out.

The adhesive matrix 3 can in particular comprise particles capable absorb moisture, so as to pump water into the adhesive matrix 3 and promote solubilization of hydrophilic active agents intended to exert a determined effect on the skin.

Among the active agents that may be used, there may be mentioned antioxidant cleaning agents, anti-free radicals, hydrating, depigmenting, liporegulatory, anti-acne, anti-seborrhic, anti-aging, softeners, anti-wrinkles, keratolitics, anti-inflammatories, refreshing, healing, vascular protectors, antibacterial, antifungal, antiperspirants, deodorants, skin conditioners, insensitizers, immunomodulators, nourishing, sebum absorbers (Orgasol for example) or humidity.

The adhesive matrix 3 can thus comprise a water-soluble active agent chosen from the following compounds: ascorbic acid and its biologically compatible salts, enzymes, antibiotics, components with tensor effect, α-hydroxy acids and their salts, hydroxylated polyacids , sucroses and their derivatives, urea, amino acids, oligopeptides, water-soluble plant and yeast extracts, protein hydrolysates, hyaluronic acid, mucopolysaccharides, vitamins B ₂ , B ₆ , H, PP, panthenol, folic acid, acetyl salicylic acid, allantoin, glycyrrhetic acid, kojic acid, hydroquinone.

The adhesive matrix 3 may also comprise at least one liposoluble active agent chosen from the following compounds: D-α-tocopherol, DL-α-tocopherol, D-α-tocopherol acetate, DL-α-tocopherol acetate, ascorbyl palmitate , vitamin F and vitamin F glycerides, vitamin D, vitamin D ₂ , vitamin D ₃ , retinol, retinol esters, retinol palmitate, retinol propionate, β-carotene, D-panthenol, farnesol, farnesyl acetate; jojoba and blackcurrant oils rich in essential fatty acids; keratolytics such as salicylic acid, its salts and its esters, n-octanoyl-5 salicylic acid and its esters, alkyl esters of α-hydroxy acids such as citric acid, lactic acid, glycolic acid; asian acid, madecassic acid, asiaticoside, total extract of centella asiatica, β-glycyrrhetinic acid, α-bisabolol, ceramides such as 2 oleoylamino-1,3 octadecane; phytanetriol, milk sphingomycline, phospholipids of marine origin rich in essential polyunsaturated fatty acids, ethoxyquin; rosemary extract, lemon balm extract, quercetin, dried microalgae extract, steroidal anti-inflammatory drugs.

Such active agents can be incorporated in the solubilized state in oils, used alone or in combination, among which there may be mentioned: oils of animal, vegetable or mineral origin, and in particular animal or vegetable oils formed by esters of fatty acid and polyols, in particular liquid triglycerides, for example sunflower, corn, soybean, squash, sesame, hazelnut, pistachio, apricot, almond or avocado oils; fish oils, glycerol tricaproccaprylate, or vegetable or animal oils of formula R ₁ COOR ₂ in which R ₁ represents the remainder of a higher fatty acid containing from 7 to 19 carbon atoms and R ₂ represents a hydrocarbon chain branched containing 3 to 20 carbon atoms, for example, Purcellin oil; wheat germ oil, calophyllum, sesame, coriander, safflower, passionflower oil, rosa mosqueta oil, macadamia, fruit seeds (grapes, blackcurrant, orange, kiwi), rapeseed, copra, peanut, evening primrose, palm, castor, flax, jojoba, chia, olive or cereal germs such as wheat germ oil, bran, rice, shea oil; acetylglycerides; octanoates, decanoates or ricinoleates of alcohols or polyalcohols; fatty acid triglycerides; glycerides; paraffin oil, petrolatum, perhydrosqualene; fatty alcohols (stearyl alcohol, cetyl alcohol) and fatty acids (stearic acid) and their esters; polyalkyl (C ₁ -C ₂₀ ) siloxanes and in particular those with trimethylsilyl end groups, preferably those whose viscosity is less than 0.06 m ² / s among which mention may be made of linear polydimethylsiloxanes and alkylmethylpolysiloxanes such as cetyldimethicone ( CTFA name).

Mention may also be made of partially fluorinated hydrocarbon oils or perfluorinated oils, and in particular perfluoropolyethers and perfluoroalkanes.

The oily phase, i.e. the oil droplets dispersed in the layer of polymer, may be present in a proportion ranging from 0.1% to 30% by weight per relative to the total weight of the composition. Preferably, this percentage is between 5 and 25%.

Alternatively, the liposoluble active ingredient (s) are incorporated into a layer of hydrophobic polymer, in the form of powder or granules.

To apply the adhesive matrix 3 to the backing sheet 2 when manufacturing, the support sheet 2 is scrolled and the matrix is deposited by coating adhesive 3, then in solvent phase.

The solvent is then evaporated.

It is advantageous that the support sheet 2 in contact with the abovementioned solvent is not not stretchable, at least in its direction of travel during coating, as this facilitates its guidance and its winding.

The invention is not limited to the embodiments described, and it is possible by example combine perforations and cutouts within the same support sheet.

Claims (25)

Mask for the face or the body, comprising a support sheet coated on one side with an adhesive matrix comprising a permanent adhesive adhering to both on dry and wet skin, at least one of the backing sheet and the matrix adhesive comprising at least one active (4) intended to exert a specific action on the skin, characterized in that the adhesive matrix (3) is stretchable at least in the state wet to allow the mask to adapt to the shape of the face or part of the body to be treated, the support sheet (2) being chosen to be able, at least in the state when wet, stretch to accompany deformations of the adhesive matrix (3). Mask according to claim 1, characterized in that it presents during the use, in at least one direction, of an elongation factor of between 5 and 30%, preferably between 10 and 30% and more preferably between 15 and 30%. Mask according to claim 1 or 2, characterized in that the adhesive is hydrophobic. Mask according to any one of the preceding claims, characterized by the fact that the adhesive matrix (3) forms an occlusive layer. Mask according to any one of the preceding claims, characterized by the fact that the support sheet (2) has perforations (5; 6) and / or cutouts (7; 8). Mask according to the preceding claim, characterized in that the support sheet has diamond-shaped perforations (6). Mask according to claim 5, characterized in that the sheet of support comprises slots (7) arranged in staggered rows. Mask according to any one of the preceding claims, characterized by the fact that the adhesive matrix (3) is chosen so as to present, when it is applied in the fluid state to the support sheet during the manufacture of the mask, a viscosity allowing it not to cross it. Mask according to any one of the preceding claims, characterized by the fact that it contains one or more water-soluble and / or liposoluble active ingredients ( in the adhesive matrix (3). Mask according to any one of the preceding claims, characterized by the fact that the adhesive matrix (3) is deposited in an amount between 15 and 70 g / m2 on the backing sheet (2). Mask according to any one of the preceding claims, characterized by the fact that the adhesive is chosen from the following list: acrylic-based adhesives, vinyl, polyurethane, silicone or elastomer, copolymers and / or mixtures of these. Mask according to any one of the preceding claims, characterized by the fact that it contains one or more water-absorbing substances embedded in the adhesive matrix (3), for example polyacrylates or alginates, corn derivatives or cellulose, natural or synthetic water-absorbing particles or fibers. Mask according to any one of the preceding claims, characterized by the fact that the support sheet (2) is made of a water-swellable material. Mask according to any one of the preceding claims, characterized by the fact that the support sheet (2) is constituted by an elastic woven. Mask according to any one of the preceding claims, characterized by the fact that the support sheet is constituted by a hydrophyle nonwoven. Mask according to any one of the preceding claims, characterized by the fact that the support sheet comprises one or more substances or particles or water-absorbent fibers. Mask according to one of the two preceding claims, characterized by the fact that the nonwoven contains a large proportion of viscose or cotton, preferably between 30 and 90% (by mass). Mask according to any one of the preceding claims, characterized by the fact that the support sheet comprises polypropylene or polyester, preferably in a proportion of between 5 and 95% (by mass). Mask according to any one of the preceding claims, characterized by the fact that the adhesive and the backing sheet are chosen so that once wet, the mask has a surface in the stretched state 5 to 70% greater than the surface of the mask in the dry state, and preferably greater by 10 to 70% and more preferably 20 to 70% higher. Mask according to any one of the preceding claims, characterized by the fact that it includes assets (4) chosen to exercise an action chosen from the list next: moisturize, level, lighten, tone, thin, heal, numb. Mask according to any one of the preceding claims, characterized by the fact that the support sheet is non-stretchable as long as it is not impregnated with water and preferably it is not stretchable either when it is in contact with the matrix to the fluid state, in solvent phase, during the manufacture of the mask. Use of a mask as defined in any one of the previous claims for treating the face or neck. Use of a mask as defined in any one of the Claims 1 to 21 for treating the thighs. Use of the mask as defined in any of the claims 1 to 21, the mask being soaked in water before application, then applied preferably on wet skin while being stretched so as to adapt to the user morphology. Use of the mask as defined in any of the Claims 1 to 21, characterized in that it is applied in the dry state to the skin wet then the support sheet is sprayed with water.

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